Quick answers
- Which hospitals does Mark A. Sandquist work at?
- Medicare's official clinician data lists Mark A. Sandquist at 1 hospital: Marian Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark A. Sandquist see patients?
- Medicare's clinician data lists 1 practice location in Santa Maria, CA. Call before your visit to confirm the address.
- What is Mark A. Sandquist's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Mark A. Sandquist accept Medicare assignment?
- Yes. Medicare's clinician data says Mark A. Sandquist accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Mark A. Sandquist?
- (805) 739-3000, as listed in official Medicare / NPI Registry data.
- What is Mark A. Sandquist's NPI number?
- 1194757880. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark A. Sandquist works
Medicare's Facility Affiliation Data lists Mark A. Sandquist at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Marian Regional Medical CenterSanta Maria, CA · Acute Care Hospital · CCN 050107
Practice locations
Addresses where Mark A. Sandquist is enrolled with Medicare (CMS data updated 2026-10-02).
- 1400 E Church StSanta Maria, CA 93454 (805) 739‑3000
Group practices
Medicare enrollment lists Mark A. Sandquist as a member of this group (CMS data updated 2026-10-02).
- Central Coast In-Patient Consultants Inc32 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Santa Maria
Clinicians with the same Medicare primary specialty in Santa Maria, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Colorado School Of Medicine, Denver |
| Graduation year | 1987 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1194757880 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians